First download, install and run Spybot Search & Destroy and clean out what it finds.
(http://www.safer-networking.org/en/)
Next download, install and run Ad-Aware and clean out what it finds.
(http://lavasoft.com/)
Another good tool to download, install and run is HijackThis from Trend Micro.
Quick Start Guide (http://www.trendsecure.com/portal/en-US/tools/security_tools/hijackthis/qsg)
Make sure your Anti-Virus software is up to date. If you need Anti-Virus software download and install AVG.
(http://free.avg.com/)
Then go to our section on computer cleanup
(http://www.kuenzercomputers.com/wp/?p=5)